What two methods can the security team use to rotate each key?

A company has several Customer Master Keys (CMK), some of which have imported key material. Each CMK must be rotated annually.

What two methods can the security team use to rotate each key? Select 2 answers from the options given below
A . Enable automatic key rotation for a CMK
B . Import new key material to an existing CMK
C . Use the CLI or console to explicitly rotate an existing CMK
D . Import new key material to a new CMK; Point the key alias to the new CM
F . Delete an existing CMK and a new default CMK will be created.

View Answer

Answer: A,D

Explanation:

The AWS Documentation mentions the following

Automatic key rotation is available for all customer managed CMKs with KMS-generated key material. It is not available for CMKs that have imported key material (the value of the Origin field is External), but you can rotate these CMKs manually. Rotating Keys Manually

You might want to create a newCMKand use it in place of a current CMK instead of enabling automatic key rotation. When the new CMK has different cryptographic material

than the current CMK, using the new CMK has the same effect as changing the backing key in an existing CMK. The process of replacing one CMK with another is known as manual key rotation.

When you begin using the new CMK, be sure to keep the original CMK enabled so that AWS KMS can decrypt data that the original CMK encrypted. When decrypting data, KMS identifies the CMK that was used to encrypt the data, and it uses the sam CMK to decrypt the data. As long as you keep both the original and new CMKs enabled, AWS KMS can decrypt any data that was encrypted by either CMK.

Option B is invalid because you also need to point the key alias to the new key Option C is invalid because existing CMK keys cannot be rotated as they are

Option E is invalid because deleting existing keys will not guarantee the creation of a new default CMK key

For more information on Key rotation please see the below Link:

https://docs.aws.amazon.com/kms/latest/developereuide/rotate-keys.html

The correct answers are: Enable automatic key rotation for a CMK, Import new key material to a new CMK; Point the key alias to the new CMK. Submit your Feedback/Queries to our Experts